Brittle materials fail catastrophically. In consequence of their limited flaw-tolerance, failure occurs by localized fracture and is typically a dynamic process. Recently, experiments on epithelial cell monolayers have revealed that this scenario can be significantly modified when the material susceptible to cracking is adhered to a hydrogel substrate. Thanks to the hydraulic coupling between the brittle layer and the poroelastic substrate, such a composite can develop a toughening mechanism that relies on the simultaneous growth of multiple cracks. Here, we study this remarkable behaviour by means of a detailed model, and explore how the material and loading parameters concur in determining the macroscopic toughness of the system. By extending a previous study, our results show that rapid loading conveys material toughness by promoting distributed cracking. Moreover, our theoretical findings may suggest innovative architectures of flaw-insensitive materials with higher toughness. ArXIV
Concurrent factors determine toughening in the hydraulic fracture of poroelastic composites / Lucantonio, A; Noselli, G. - In: MECCANICA. - ISSN 0025-6455. - 52:14(2017), pp. 3489-3498.
|Titolo:||Concurrent factors determine toughening in the hydraulic fracture of poroelastic composites|
|Autori:||Lucantonio, A; Noselli, G|
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1007/s11012-017-0621-5|
|Appare nelle tipologie:||1.1 Journal article|